APA (7th ed.) Citation

Gregori I, p. (1551). Omnia Quae Extant, Opera. Charlotte Guillard i Guillaume Des Bois.

Chicago Style (17th ed.) Citation

Gregori I, papa. Omnia Quae Extant, Opera. Paris: Charlotte Guillard i Guillaume Des Bois, 1551.

MLA (9th ed.) Citation

Gregori I, papa. Omnia Quae Extant, Opera. Charlotte Guillard i Guillaume Des Bois, 1551.

Warning: These citations may not always be 100% accurate.